Section 3 introduction, 1 what you have received, 2 a sensor maintenance kit – Hach-Lange ORBISPHERE 31xxx Installation and Maintenance User Manual
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Section 3
Introduction
3.1 What you have received
Check that all mounting hardware is included. Note that, unless the sensor is part of
ORBISPHERE equipment that includes it, the sensor must be installed in an ORBISPHERE
socket or flow chamber that allows contact with the sample flow to be analyzed (refer to
for details).
3.1.1 An oxygen, ozone, or hydrogen electrochemical sensor
The sensor head is protected by a screw-on plastic storage cap. A plastic screw-on base
protects the connection socket, and provides at the same time a suitable stand.
3.1.2 A sensor maintenance kit
The kit includes the material needed to maintain the sensor, including consumables, hardware,
membrane removal and installation tools, plus a polishing device.
3.2 Basic principle of operation
In its simplest form, an electrochemical cell consists of a metal anode and a metal cathode
dipped into an electrolyte solution contacting these electrodes. An electronic circuit is linked to
the anode and cathode. Through an applied voltage, current will flow between the anode and
the cathode.
Figure 2 Electrochemical sensor components
Figure 3 Sensor cell components